The Whitney-Scharf was the final rifle manufactured by the Whitney company before it was bought out and closed down by Winchester in 1888. Only about 2,000 of these rifles were made before that time.
British EM-2: The Best Cold War Battle Rifle that Never Was
Follow Up DBFS9 Full Size 9mm
GUNTEC USA AR 9mm Pistol Build
S&W 44 magnum (The Rundown)
Spanish FR-8: the "Cetmeton"